To resolve this issue, check If a host will not be monitored by an enable provider, remove it from the cluster. To find the unmonitored host follow the below steps:
- In a web browser, navigate to https://vCenter_Server_name_or_IP/mob
Where vCenter_Server_name_or_IP/mob is the name of your vCenter Server or its IP address. Log in with your vCenter SSO admin credentials.
- Click Content.
- Click group-d1 (Datacenters)
- Click datacenter-X (<datacenter name>). Choose the target datacenter if there are multiple.
- Click group-hX (host).
- In value of the property "childEntity", find the target cluster based on the cluster name in the brackets in the value. The cluster id should be like "domain-c8".
- Go back to the Content page in step 2.
- Click HealthUpdateManager.
- Click QueryProviderList and click Invoke Method in the popup window.
In the popup window, note down the uuid(s) of the provider(s) in the val field.
- Close the popup window.
- Click QueryUnmonitoredHosts.
- In the popup window, enter the provider uuid noted in step 9 into the providerId field. In the cluster field, replace "MOID" with the cluster id noted in step 6.
- Click Invoke Method.
- Repeat step 12 and 13 for each provider if there are multiple.